CVE-2026-95702— Code Execution in Host Sentry Process via Double Free in gVisor VFS MemoryFile
Quick assessment
Affected
Google gVisor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Google gVisor 于 20260831.0 版本之前的所有平台中，虚拟文件系统（VFS）存在一个释放后使用（use-after-free）漏洞。具有标准容器权限的本地攻击者可以通过双重释放（double-free）来自沙箱内覆盖文件系统的底层 MemoryFile，从而在主机 sentry 进程中实现代码执行。sentry 进程仍受主机级 Linux seccomp 和命名空间边界的限制。
Possible ATT&CK Techniques 3 AI
T1610 · Deploy Container T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-95702
Vulnerability Information
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Vulnerability Title
Code Execution in Host Sentry Process via Double Free in gVisor VFS MemoryFile
Source: CVE Program / CVE List V5
Vulnerability Description
Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The sentry process remains confined by host-level Linux seccomp and namespace boundaries.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-95702
| # | POC Description | Source Link | Shenlong Link |
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Other References for CVE-2026-95702 (3)
IV. Related Vulnerabilities
Same vendor: Google
Same weakness: CWE-416
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V. Comments for CVE-2026-95702
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